- Source: Seismicity
Seismicity is a measure encompassing earthquake occurrences, mechanisms, and magnitude at a given geographical location. As such, it summarizes a region's seismic activity. The term was coined by Beno Gutenberg and Charles Francis Richter in 1941. Seismicity is studied by geophysicists.
Calculation of seismicity
Seismicity is quantitatively computed. Generally, the region under study is divided in equally sized areas defined by latitude and longitude, and the Earth's interior is divided into various depth intervals on account of Earth's layering: Up to 50 km (31 mi) depth, 50–300 km (31–186 mi), and > 300 km (190 mi).
The usual formula to calculate seismicity is:
S
=
∑
i
E
s
0
i
δ
ϕ
0
δ
λ
0
δ
h
0
δ
t
0
{\displaystyle S={\frac {\sum _{i}{E_{s0}}_{i}}{\delta \phi _{0}\,\delta \lambda _{0}\,\delta h_{0}\,\delta t_{0}}}}
where
E
s
0
i
{\displaystyle {E_{s0}}_{i}}
: is the energy of a single seismic event (i.e., earthquake);
δ
ϕ
0
{\displaystyle {\delta \phi }_{0}}
: interval of latitude;
δ
λ
0
{\displaystyle {\delta \lambda }_{0}}
: interval of longitude
δ
h
0
{\displaystyle {\delta h}_{0}}
: interval of the hypocenter;
δ
t
0
{\displaystyle {\delta t}_{0}}
: interval of the time of the seismic event.
The result is seismicity as energy per cubic unit.
See also
Moment magnitude scale
Plate tectonics
Seismology
Wadati–Benioff zone
References
Kata Kunci Pencarian:
- Daftar gempa bumi di Indonesia
- Batas konvergen
- Gempa bumi dan tsunami Samudra Hindia 2004
- Dwikorita Karnawati
- Pegunungan Himalaya
- Charles Richter
- Gempa bumi San Francisco 1906
- Sesar Palu-Koro
- Gempa bumi
- Pembangkit listrik tenaga panas bumi
- Seismicity
- Earthquake
- Induced seismicity
- Seismic moment
- Seismic zone
- Seismology
- Seismic magnitude scales
- Seismic risk
- Seismic source
- Seismic gap
